Vehicle Front Body Framework for Multi-Mode Collision Energy Absorption
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Solution Overview
Problem
Existing vehicle body structures fail to effectively absorb collision energy in multiple frontal collision modes, potentially leading to deformation of the cabin and battery pack in hybrid or electric vehicles.
Innovation Solution
A vehicle body front structure comprising front side frames, sub-frames, upper frames, a cross member, columnar frames, coupling frames, and reinforcement brackets, which form a rigid framework to disperse and absorb collision energy through controlled deformation, protecting the cabin and battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a simple front side member structure is used, then manufacturing cost and device complexity are reduced, but collision energy absorption capability and protection of the battery pack are insufficient
Solution Approach 1:
The front side member is divided into multiple functional segments: a front side frame extending in the vehicle width direction, columnar frames extending in the vertical direction, and coupling frames connecting them. This segmentation allows each component to independently contribute to collision energy absorption while maintaining structural integrity and protecting the battery pack.
Solution Approach 2:
The structure transitions from a two-dimensional planar arrangement to a three-dimensional spatial framework by adding columnar frames that extend vertically and coupling frames that connect different vertical levels. This dimensional enhancement creates a rigid framework that effectively absorbs collision energy from multiple directions while protecting the battery pack.
2Reliability
If a rigid framework structure is added to protect the battery pack, then collision energy absorption and protection capability are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The front side member structure serves multiple functions simultaneously: the front side frame provides lateral support, columnar frames provide vertical support, and coupling frames connect different levels. This multi-functional design creates a comprehensive protection system for the battery pack while using integrated components that can be manufactured as unified structures, reducing overall manufacturing complexity.
3Ease of operation
If the front side member structure is simplified, then ease of operation and assembly are improved, but the ability to disperse collision energy in multiple collision modes is reduced
Solution Approach 1:
The front side member structure is pre-configured with multiple geometric shapes and rigid framework elements positioned to address different collision scenarios. The columnar frames and coupling frames are arranged in advance to provide protection against various collision modes including frontal, offset, and rolling collisions, allowing the structure to adapt to different collision types without requiring complex active control systems.
Data Source
AI summary
A vehicle body front structure includes front side frames, sub-frames, upper frames, a cross member, columnar frames each disposed outward of a joint between a corresponding one of the front side frames and the cross member in a vehicle width direction, coupling frames each disposed on a corresponding one of the columnar frames, and reinforcement brackets each coupled to a front portion and an outer portion of a corresponding one of the coupling frames. The columnar frame each couple the corresponding one of the front side frames and a corresponding one of the sub-frames in a vehicle vertical direction. The coupling frame each couple the corresponding one of the columnar frames and a corresponding one of the upper frames in the vehicle vertical direction. The reinforcement brackets each couple the corresponding one of the coupling frames and a rear portion of a corresponding one of the upper frames.